Results 91 to 100 of about 4,784,649 (246)

Forest in situ observations through a fully automated under-canopy unmanned aerial vehicle

Geo-spatial Information Science
Close-range sensing has yet to attain the status of being a dependable source for in situ forest information as the conventional field inventory. Each solution has its advantages and disadvantages in terms of accuracy, completeness, and efficiency. For a
Xinlian Liang, Haiyun Yao, Hanwen Qi, Xiaochen Wang   +3 more
doaj   +1 more source

Accuracy of a DTM derived from full-waveform laser scanning data under unstructured eucalypt forest: a case study [PDF]

, 2010
A Digital Terrain Model (DTM) is fundamental for extracting several forest canopy structure metrics from data acquired with small-footprint airborne laser scanning (ALS).
Gomes Pereira, L., Gonçalves, G.
core  

Analysis of hybrid Nd:Yag laser-MAG arc welding processes. [PDF]

, 2011
In the hybrid laser-arc welding process, a laser beam and an electric arc are coupled in order to combine the advantages of both processes: high welding speed, low thermal load and high depth penetration thanks to the laser; less demanding on joint ...
F. Coste, E. Le Guen, P. Le Masson, COSTE, Frédéric, LE MASSON, Philippe, M. Carin, LE GUEN, Emilie, FABBRO, Rémy, CARIN, Muriel, R. Fabbro   +9 more
core   +1 more source

Open or closed: Experience of head and neck radiotherapy masks – A mixed‐methods study

Journal of Medical Radiation Sciences, Volume 72, Issue 1, Page 74-84, March 2025.
Patients with head and neck cancer received radiotherapy alternately with an open and a closed mask. The closed mask was perceived as more confining and restrictive, but it was also considered to make it easier to quickly achieve the correct position, while the open mask was perceived as less stable, although it reduced the feeling of claustrophobia ...
Erik Lundin, Sofia Axelsson, Emma Ohlsson‐Nevo   +2 more
wiley   +1 more source

Femtosecond Laser‐Induced Recrystallized Nanotexturing for Identity Document Security With Physical Unclonable Functions

Advanced Science
Counterfeit identity (ID) documents pose a serious threat to personal credit and national security. As a promising candidate, optical physical unclonable functions (PUFs) offer a robust defense mechanism against counterfeits.
Panpan Niu, Jiao Geng, Qilin Jiang, Yangyundou Wang, Jianxin Sang, Zhenghong Wang, Liping Shi   +6 more
doaj   +1 more source

Microwave‐Assisted Green Synthesis of CuO Nanoparticles Using Myrciaria Dubia Extract for Efficient Solar‐Light‐Driven Photocatalytic Degradation of Methylene Blue

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT This study reports a microwave‐assisted biogenic route for synthesizing CuO nanoparticles using Myrciaria dubia (camu camu) fruit extract under three microwave power–time programs: 700 W for 30 s (M1), 350 W for 60 s (M2), and 150 W for 300 s (M3).
Elisabeth Viviana Lucero Baldevenites, Ana María Gayol   +1 more
wiley   +1 more source

Prediction of stand-level growing stock by using a spatial regression model in an Austrian protection forest

Ecological Informatics
A digital forest inventory is proposed to estimate growing stock in a mountainous protection forest near Ebensee, Austria. As protection forests cover 42% of Austria's forest area and safeguard against natural hazards, continuous monitoring is essential ...
Valentin Sarkleti, Tobias Ofner-Graff, Andreas Tockner, Sarah Witzmann, Ralf Kassnitzer, Christoph Gollob, Tim Ritter, Arne Nothdurft   +7 more
doaj   +1 more source

A Label-Free Ultraviolet Photoacoustic Microscopy Enables Nuclear Imaging and Toxicity Assessment in an Intact Brain Organoid. [PDF]

Small
Ultraviolet photoacoustic microscopy enables label‐free visualization of nuclear morphology in intact human brain organoids. By exploiting endogenous nucleic acid absorption at 266 nm, this approach resolves individual nuclei without staining or sectioning.
Kye H, Yu WJ, Wang LV, Kim J, Park JC, Park B.   +5 more
europepmc   +2 more sources

Model-based inference for biomass estimation in a LiDAR sample survey in Hedmark County, Norway [PDF]

, 2011
In forest inventories, regression models are often applied to predict quantities such as biomass at the level of sampling units. In this paper, we propose a model-based inference framework for combining sampling and model errors in the variance ...
Erik Næsset, Ross Nelson, Holm, Sören, Göran Ståhl, Sören Holm, Timothy G. Gregoire, Ståhl, Göran, Gregoire, Timothy G., Gobakken, Terje, Terje Gobakken, Næsset, Erik, Nelson, Ross, Sveriges lantbruksuniversitet., Holm, Sören,, Ståhl, Göran,   +14 more
core   +1 more source

Mass Spectrometry in Authentication and Forensic Approaches for Determining the Origin of Hazardous Chemicals

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Identification of a chemical agent yields insights into its physicochemical properties. By examining the intrinsic characteristics and environment of a compound, information about its history can be gathered. The main objective of authentication/forensic approaches to chemicals is to trace the history of the compound's origin, regardless of ...
Carla Orlandi, Grégoire Delaporte, Christine Albaret, Emmanuel Joubert, Anne Bossée, Emilien L. Jamin, Laurent Debrauwer   +6 more
wiley   +1 more source